Joseph Bernard, marquis de Chabert (28 February 1724, Toulon - 1 December 1805) was a French sailor, geographer and astronomer. He marked himself out as a chef d'escadre during French involvement in the American War of Independence and was promoted to vice admiral in 1792. He was known above all for his scientific endeavours, notably in the rectification of naval charts of America's western coast and the coasts of the Mediterranean. He entered the Académie des sciences in 1758 and the Bureau des longitudes in 1803. In 1785, he was elected a foreign member of the Royal Swedish Academy of Sciences.